Marissa Mayer, CEO of Yahoo, has been making headlines in the tech world as of late. Most notably for her recent $1 billion cash acquisition of blogging site Tumblr. After the purchase, Mayer noted that she wanted to hold off with making any further acquisitions. Although, she added the common executive doublespeak: "Never say never," she said. Shortly after, Mayer rocked the news again by placing a bid on video-streaming giant Hulu. So in an attempt to give Mayer some sage business advice, we've complied a list of possible well-known companies, as well as potentially valuable tech startups, for her to consider acquiring.